Yes. Cards cannot activate on their own icons. You would have needed to play another card first that had the first aid symbol in the upper left hand corner in order to trigger Ripley's action.
For example: if you play First Aid Warrant Officer Ripley, and then play a second copy of the same card, the first card would grant you recruit points, but nothing else. The second copy played would grant you recruit points as well as allowing you to heal a strike.